Soil Aggregate Response to Three Freeze-Thaw Methods in a Northeastern China Mollisol Chen, Shuai Burras, C. Burras, C. Zhang, Xingyi
dc.contributor.department Agronomy 2019-08-07T15:07:45.000 2020-06-29T23:06:19Z 2020-06-29T23:06:19Z Tue Jan 01 00:00:00 UTC 2019 2019-01-01
dc.description.abstract <p>Freeze-thaw (FT) cycles occur annually in soils of mesic and frigid temperature regimes. FT has profound impacts on soil aggregates yet is often difficult to document in field settings. As a result, laboratory-based FT experiments are widely used, albeit with their own limitations. Both laboratory and field-based research indicates that aggregate properties vary with rates of freezing and thawing as well as the number and amplitudes of FT cycles. In this study, we introduce a continuous freezing-to-thawing-to-freezing technique (i.e., “VTR”) and compare it to a commonly used discrete freeze-then-thaw-then-freeze method (i.e., “RTCR”) and compare both results to natural seasonal changes. Our study soil is the A horizon of the major cropped mollisol in northeastern China. We examined it under natural field soil moisture conditions as well as two controlled soil moisture contents in the laboratory. Both RTCR and VTR show a decrease in large (>1mm) aggregate content and a corresponding increase in medium (0.5 to 0.2 mm) aggregates (P>0.05) that is proportional to the number of FT cycles and soil moisture content. Wet aggregate stability (WAS) increased (P<0.05) over the time of the experiment with each method. RTCR data showed an interaction between FT cycles and soil water content. VTR was better, although certainly not with better matched field results than RTCR, which we attribute its FT cycles being matched to anactual field. These results confirm the dependability and authenticity of the VTR technique.</p>
dc.description.comments <p>This article is published as Chen, Shuai, C. Lee Burras, and Xingyi Zhang. "Soil Aggregate Response to Three Freeze-Thaw Methods in a Northeastern China Mollisol." <em>Polish Journal of Environmental Studies </em>(2019). doi: <a href="">10.15244/pjoes/99205</a>. Posted with permission.</p>
dc.format.mimetype application/pdf
dc.identifier archive/
dc.identifier.articleid 1628
dc.identifier.contextkey 14678113
dc.identifier.s3bucket isulib-bepress-aws-west
dc.identifier.submissionpath agron_pubs/579
dc.language.iso en
dc.source.bitstream archive/|||Sat Jan 15 01:00:30 UTC 2022
dc.source.bitstream archive/|||Sat Jan 15 01:00:32 UTC 2022
dc.source.uri 10.15244/pjoes/99205
dc.subject.disciplines Environmental Sciences
dc.subject.disciplines Hydrology
dc.subject.disciplines Soil Science
dc.subject.keywords simulation
dc.subject.keywords freeze-thaw cycles
dc.subject.keywords water contents
dc.subject.keywords soil aggregate stability
dc.title Soil Aggregate Response to Three Freeze-Thaw Methods in a Northeastern China Mollisol
dc.type article
dc.type.genre article
dspace.entity.type Publication
relation.isAuthorOfPublication 8742ab5b-ceec-4fd2-9668-044f07dc0c45
relation.isOrgUnitOfPublication fdd5c06c-bdbe-469c-a38e-51e664fece7a
Original bundle
Now showing 1 - 2 of 2
No Thumbnail Available
3.15 MB
Adobe Portable Document Format
No Thumbnail Available
125.4 KB
Adobe Portable Document Format